Bypass trimmer features self-sharpening blades so no replacement blades are needed. Blade cuts up to 10 sheets of paper at a time. Cutting arm lock is built-in for safe transporting and storage. Use precision printed scale and grid on base for easy alignment. Trimmer also features a paper clamp, smudge guard and anti-skid rubber feet for stability. Trimmer base is made from a high percentage of recycled post-consumer resin.